.banner{
    height: 500px;
}
.banner1{
    background: url("../img/banner.jpg");
    background-size:cover ;
}
.banner2{
    background: url("../img/banner2.jpg");
    background-size:cover ;
}
.banner3{
    background: url("../img/banner3.jpg");
    background-size:cover ;
}
.card-img-top{
    margin: 5px auto;
    width: 95%;
}
main{
    background-image: url("../img/banner4.jpg");
    padding-top:10px;
}
footer{
    padding-top: 26px;
    padding-bottom: 26px;
}
/*响应式*/
@media (max-width: 600px) {
    .banner{
        height: 230px;
    }
}
/*网站的内容部分*/
.card .card-text{
    height: 30px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.col-md-3 a ,.col-md-3 h6{
    font-size: 14px;
    font-family: 微软雅黑;
}
.col-md-3 a:hover{
    text-decoration: none;
}
.row .col-md-6 h2{
    font-weight: bold;
}
.row .col-md-6 p{
    font-size: 14px;
    font-family: 微软雅黑;
}
